Research on how to increase positive moods and capitalize on your strengths has proliferated in recent years, thanks to the positive psychology movement, and has shed light on ongoing insights into personality, mood, and cognition.
The glass is half-empty and storm-clouds loom overhead (never with a silver lining). Pessimists get a lot of flak for negativity, and their health may take a beating, too. But they make better leaders and are more resistant to false advertising. Having realistic expectations may actually be a recipe for happiness.